Upload Web Developer source

My project is web-based and then developed on VWD Express Edition.
I have downloaded and isntalled the Team Explorer client and I have connected the Codeplex's Team server, but unfortunately I am unable to open my project to upload it: because a VWD project has no .vbproj file I am unable to open it using Team Explorer.
Can you please explain me how should I open the project's source code and then upload it?